19909729

素因数分解:

$7^2\times {\mathrm{61}}^1\times {\mathrm{6661}}^1$

素因数の和:6736

約数の個数: 12

約数和(自身を含む): 23543508

約数和(自身を除く): 3633779

約数列:

[1, 7, 49, 61, 427, 2989, 6661, 46627, 326389, 406321, 2844247, 19909729]

約数ペア:

[(1, 19909729), (7, 2844247), (49, 406321), (61, 326389), (427, 46627), (2989, 6661)]